Oil pressure braking pump with different braking stages

ABSTRACT

An oil pressure braking pump, comprises a supporting frame having a receiving space; a piston and an adjusting unit being received in the receiving space; a handle being installed to the supporting frame; the handle serving to actuate a piston within the supporting frame; the piston being driven by the handle; an adjusting unit having a plurality of elastic units which has different elastic coefficients so as to push a pneumatic pressure device with different stages. The handle can push the piston; and then the piston pushes the adjusting unit to further drive the pneumatic pressure device with different stages.

FIELD OF THE INVENTION

The present invention relates to brakes, and particularly to an oil pressure braking pump which can provide a braking effect with different stages by using at least two elastic units.

BACKGROUND OF THE INVENTION

Braking is important for a vehicle safety. If the braking system is bad, the driver cannot well control a bicycle, especially when the bicycle is driven in high speed. However a bad braking system can not provide a well protect to the driver.

In one prior art braking pump, an oil pressure braking system has a pump. A retainer is installed to the pump. The retainer is used as a fulcrum for adjusting between a releasing position and a braking position. In braking, an actuating rod in the handle will reduce inwards so as to have a braking effect. A braking handle has a seat having a transversal assembly hole. The hole has an opening facing to the pump. A spring is assembled to the hole of the handle. A control block is also assembled to the seat. The control block has a control rod which is protruded from the opening and resists against the actuating rod. A sealing block is installed to the opening of the seat for sealing the assembly hole.

However the prior art braking device is transversally penetrated by a handle and a screw rod resisting against the pneumatic device for providing barking force by pneumatic pressures. The angle adjustable is finite. The barking handle is not in parallel to the pneumatic rod, but is tilt to the pneumatic rod. Thus, the contact therebetween is not complete. The pressure can not be transferred completely, the contact surface of the stud and pneumatic rod is easy to wear. For a long time, the whole structure will destroy. Moreover, the pressure is directly transferred to the braking pump. The oil pressure of the braking pump is controlled by the pressure from the finger. The braking is one stage, but not multiple stages. Thus, the control is inconvenient, even some accident occurs.

Thus, there is an eager demand for a novel design which is more stable and more effective.

SUMMARY OF THE INVENTION

Accordingly, the primary object of the present invention is to provide an oil pressure braking pump which can provide a braking effect with different stages by using at least two elastic units.

To achieve above objects, the present invention provides an oil pressure braking pump, comprising: a supporting frame having a receiving space; a piston and an adjusting unit being received in the receiving space; a handle being installed to the supporting frame; the handle serving to actuate a piston within the supporting frame; the piston being driven by the handle; an adjusting unit having a plurality of elastic units which has different elastic coefficients so as to push a pneumatic pressure device with different stages. The handle can push the piston; and then the piston pushes the adjusting unit to further drive the pneumatic pressure device with different stages. The handle having a holding end and a push unit; the holding end is interacted with a push unit. A bottom of the supporting frame having an installing hole by which the supporting frame can be assembled to a vehicle. The adjusting unit includes a first elastic unit and a second elastic unit. The adjusting unit further includes a round cover and a pneumatic pressure pushing cover. One end of the second elastic unit is installed to the piston and another end of the second elastic unit is installed to the pneumatic pressure pushing cover. The second elastic unit is longer than the first elastic unit. A diameter of the first elastic unit is greater than that of the second elastic unit; an elastic coefficient of the second elastic unit is smaller than that of the first elastic unit; the round cover has a through hole. The second elastic unit passes through the through hole of the round cover and is received within the first elastic unit. Both of the first elastic unit and second elastic unit are assembled to the pneumatic pressure pushing cover.

The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an explosive schematic view of the oil pressure braking pump of the present invention.

FIG. 2 is an assembled schematic cross sectional view of the oil pressure braking pump of the present invention.

FIG. 3 is a schematic cross sectional view of the oil pressure braking pump in a first braking stage.

FIG. 4 is a schematic cross sectional view of the oil pressure braking pump in a second braking stage.

DETAILED DESCRIPTION OF THE INVENTION

In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.

With referring to FIGS. 1 and 2, the oil pressure braking pump of the present invention is illustrated. The present invention has the feature elements.

A supporting frame 2 has a receiving space 22. A piston 4 and an adjusting unit 5 are received in the receiving space 22. A bottom of the supporting frame 2 has an installing hole 21 by which the supporting frame 2 can be assembled to a vehicle.

The handle 3 is installed to the supporting frame 2. The handle 3 has a holding end 31 and a push unit 32. The holding end 31 is interacted with a push unit 32.

A piston 4 has a rod structure. In braking, the holding end 31 is pressed and thus the push unit 32 will push the piston 4. The piston 4 is driven by the push unit 32.

An adjusting unit 5 has a second elastic unit 51, a round cover 52, a first elastic unit 53, and a pneumatic pressure pushing cover 54. One end of the second elastic unit 51 is installed to the piston 4 and another end of the second elastic unit 51 is installed to the pneumatic pressure pushing cover 54. The second elastic unit 51 is longer than the first elastic unit 53. A diameter of the first elastic unit 53 is greater than that of the second elastic unit 51. An elastic coefficient of the second elastic unit 51 is smaller than that of the first elastic unit 53. The round cover 52 has a through hole 521. The second elastic unit 51 passes through the through hole 521 of the round cover 52 and is received within the first elastic unit 53. Both of the first elastic unit 53 and second elastic unit 51 are assembled to the pneumatic pressure pushing cover 54. Furthermore, the pneumatic pressure pushing cover 54 is interacted with a pneumatic pressure device (not shown). When the pneumatic pressure pushing cover 54 is pushed, it will push the pneumatic pressure device so as to have the effect of braking.

When the holding end 31 is pressed, the push unit 32 will be interacted so as to push the piston 4. The piston 4 will push the second elastic unit 51. Because the second elastic unit 51 has one end assembled to the pneumatic pressure pushing cover 54, the pneumatic pressure pushing cover 54 will generate an initial braking effect. Furthermore, since the elastic coefficient of the second elastic unit 51 is smaller than that of the first elastic unit 53, the second elastic unit 51 will deform by the piston 4. When the user presses the holding end 31 further so as to further push the piston 4, the first elastic unit 53 will cause the piston 4 to push the round cover 52. Then, the first elastic unit 53 is pushed by the first elastic unit 53 and thus to push the pneumatic pressure pushing cover 54 so that the pneumatic pressure pushing cover 54 will get a large pushing force due to the greater elastic coefficient of the first elastic unit 53.

Referring to FIG. 3, when the user presses the holding end 31, the holding end 31 will interact with the push unit 32 and the piston 4. The piston 4 will push the second elastic unit 51. The second elastic unit 51 has smaller elastic coefficient. The deformation of the second elastic unit 51 will transfer to the pneumatic pressure pushing cover 54 so as to have the initial braking effect. Because the resist force of the braking from the second elastic unit 51 is positively proportional to the force of the pneumatic pressure device. The second elastic unit 51 has a smaller elastic coefficient, the pneumatic pressure device is pushed by a smaller force and thus the braking is not complete.

Referring to FIG. 4, when the initial braking is achieved, if the holding end 31 is pressed continuously, the holding end 31 will drive the push unit 32 and the piston 4 so that the piston 4 push the second elastic unit 51 continuously. The second elastic unit 51 deforms continuously so that that push unit 32 pushes the round cover 52 directly. Further the round cover 52 is connected to the first elastic unit 53. When the round cover 52 is pushed by the piston 4, the first elastic unit 53 will push the pneumatic pressure pushing cover 54. The first elastic unit 53 has a greater elastic coefficient. Thus the first elastic unit 53 generates a greater push force to push the pneumatic pressure pushing cover 54 and the pneumatic pressure pushing cover 54 pushes the pneumatic pressure device with a greater force so as to have a greater braking effect. Thereby by different elastic coefficients of the first elastic unit 53 and second elastic unit 51, a two stage braking function is achieved.

The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims. 

1. An oil pressure braking pump, comprising: a supporting frame having a receiving space; a piston and an adjusting unit being received in the receiving space; a handle being installed to the supporting frame; the handle serving to actuate a piston within the supporting frame; the piston being driven by the handle; an adjusting unit having a plurality of elastic units which has different elastic coefficients so as to push a pneumatic pressure device with different stages; and wherein the handle can push the piston; and then the piston pushes the adjusting unit to further drive the pneumatic pressure device with different stages.
 2. The oil pressure braking pump as claimed in claim 1, wherein the handle having a holding end and a push unit; the holding end is interacted with a push unit.
 3. The oil pressure braking pump as claimed in claim 1, wherein a bottom of the supporting frame having an installing hole by which the supporting frame can be assembled to a vehicle.
 4. The oil pressure braking pump as claimed in claim 1, wherein the adjusting unit includes a first elastic unit and a second elastic unit.
 5. The oil pressure braking pump as claimed in claim 4, wherein the adjusting unit further includes a round cover and a pneumatic pressure pushing cover; one end of the second elastic unit is installed to the piston and another end of the second elastic unit is installed to the pneumatic pressure pushing cover; the second elastic unit is longer than the first elastic unit; a diameter of the first elastic unit is greater than that of the second elastic unit; an elastic coefficient of the second elastic unit is smaller than that of the first elastic unit; the round cover has a through hole; the second elastic unit passes through the through hole of the round cover and is received within the first elastic unit; both of the first elastic unit and second elastic unit are assembled to the pneumatic pressure pushing cover.
 6. The oil pressure braking pump as claimed in claim 1, wherein the piston has a rod structure.
 7. The oil pressure braking pump as claimed in claim 4, wherein the pneumatic pressure pushing cover is interacted with a pneumatic pressure device.
 8. The oil pressure braking pump as claimed in claim 1, wherein when the pneumatic pressure pushing cover is pushed, it will push the pneumatic pressure device so as to have the effect of braking. 